1 // Copyright 2000-2005 the Contributors, as shown in the revision logs.
2 // Licensed under the Apache Public Source License 2.0 ("the License").
3 // You may not use this file except in compliance with the License.
10 import java.util.zip.*;
11 import org.ibex.util.*;
13 /** plays the role of InputStream, OutputStream, Reader and Writer, with logging and unchecked exceptions */
16 protected final In in;
17 protected final Out out;
18 private StringBuffer log = loggingEnabled ? new StringBuffer(16 * 1024) : null;
19 private String newLine = "\r\n";
20 private Stream in_next = null;
22 public Stream appendStream(Stream in_next) {
23 if (this.in_next != null) return this.in_next.appendStream(in_next);
24 this.in_next = in_next;
28 public static boolean loggingEnabled = "true".equals(System.getProperty("ibex.io.stream.logEnabled", "false"));
30 public void transcribe(Stream out) { transcribe(out, false); }
31 public void transcribe(Stream out, boolean close) {
33 byte[] buf = new byte[1024];
35 int numread = in.read(buf, 0, buf.length);
36 if (numread==-1) break;
37 out.out.write(buf, 0, numread);
39 if (close) out.close();
40 } catch (IOException ioe) { throw new StreamException(ioe); }
43 public void transcribe(StringBuffer out) {
45 char[] buf = new char[1024];
47 int numread = in.read(buf, 0, buf.length);
48 if (numread==-1) return;
49 out.append(buf, 0, numread);
51 //} catch (IOException ioe) { throw new StreamException(ioe); }
54 public static int countLines(Stream s) {
56 while(s.readln() != null) ret++;
60 public Stream(byte[] b, int off, int len) { this.in = new Stream.In(new ByteArrayInputStream(b, off, len)); this.out=null; }
61 public Stream(InputStream in) { this.in = new Stream.In(in); this.out = null; }
62 public Stream( OutputStream out) { this.in = null; this.out = new Stream.Out(out); }
63 public Stream(InputStream in, OutputStream out) { this.in = new Stream.In(in); this.out = new Stream.Out(out); }
64 public Stream(String s) { this(new ByteArrayInputStream(s.getBytes())); }
65 public Stream(File f) {
66 try { this.in = new Stream.In(new FileInputStream(f)); } catch (IOException e) { throw new StreamException(e); }
69 public Stream(Socket s) {
70 try { this.in = new Stream.In(s.getInputStream()); } catch (IOException e) { throw new StreamException(e); }
71 try { this.out = new Stream.Out(s.getOutputStream()); } catch (IOException e) { throw new StreamException(e); }
74 private static int ioe(Exception e) { throw new StreamException(e); }
75 public static class StreamException extends RuntimeException {
76 public StreamException(Exception e) { super(e); }
77 public StreamException(String s) { super(s); }
79 public static class EOF extends StreamException { public EOF() { super("End of stream"); } }
80 public static class Closed extends StreamException { public Closed(String s) { super(s); } }
83 private static Hashtable blocker = new Hashtable();
84 public static void kill(Thread thread) {
85 Stream block = (Stream)blocker.get(thread);
87 Log.warn(Stream.class, "thread " + thread + " is not blocked on a stream");
89 Log.warn(Stream.class, "asynchronously closing " + block);
95 Stream old = (Stream)blocker.get(Thread.currentThread());
97 blocker.put(Thread.currentThread(), this);
98 flush(); return in.getc(true);
99 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
102 Stream old = (Stream)blocker.get(Thread.currentThread());
104 blocker.put(Thread.currentThread(), this);
105 flush(); char ret = in.getc(false); log(ret); return ret;
106 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
108 public String readln() {
109 Stream old = (Stream)blocker.get(Thread.currentThread());
111 blocker.put(Thread.currentThread(), this);
112 flush(); String s = in.readln(); log(s); log('\n'); return s;
113 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
116 public void print(String s) {
117 Stream old = (Stream)blocker.get(Thread.currentThread());
119 blocker.put(Thread.currentThread(), this);
123 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
125 public void println(String s) {
126 Stream old = (Stream)blocker.get(Thread.currentThread());
128 blocker.put(Thread.currentThread(), this);
134 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
136 public void flush() {
137 Stream old = (Stream)blocker.get(Thread.currentThread());
139 blocker.put(Thread.currentThread(), this);
140 if (out != null) try { out.w.flush(); } catch(IOException e) { ioe(e); }
141 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
143 public int read(byte[] b, int off, int len) {
144 Stream old = (Stream)blocker.get(Thread.currentThread());
146 blocker.put(Thread.currentThread(), this);
148 int ret = in.readBytes(b, off, len);
149 if (log != null) log("\n[read " + ret + " bytes of binary data ]\n");
152 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
154 public int read(char[] c, int off, int len) {
155 Stream old = (Stream)blocker.get(Thread.currentThread());
157 blocker.put(Thread.currentThread(), this);
159 int ret = in.read(c, off, len);
160 if (log != null && ret != -1) log(new String(c, off, ret));
162 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
165 public void unread(String s) { in.unread(s); }
167 public void close() { try { if (in!=null) in.close(); } finally { if (out!=null) out.close(); } }
168 public void setNewline(String s) { newLine = s; }
171 /** dumps the connection log into a file */
172 public String dumpLog() { if (log==null) return ""; String ret = log.toString(); log = new StringBuffer(16 * 1024); return ret; }
173 private void log(String s) { if(log==null) return; if (!nnl) Log.note("\n[read ] "); Log.note(s + "\n"); nnl=false; if (log != null) log.append(s); }
174 private void logWrite(String s) { if(log==null) return; if (nnl) Log.note("\n"); Log.note("[write] "+s+"\n"); nnl=false; if (log != null) log.append(s); }
175 private void log(char c) { if(log==null) return; if (c == '\r') return; if (!nnl) Log.note("[read ] "); Log.note(c+""); nnl = c != '\n'; if (log != null) log.append(c); }
176 private boolean nnl = false;
178 private static class Out extends BufferedOutputStream {
179 private Writer w = new BufferedWriter(new OutputStreamWriter(this));
180 public Out(OutputStream out) { super(out); }
181 public void close() { try { super.close(); } catch (Exception e) { Log.error(this, e); } }
182 public void write(String s) { try { w.write(s); } catch (IOException e) { ioe(e); } }
185 private class In extends InputStream {
186 public final Reader reader = new InputStreamReader(this);
187 private /*final*/ InputStream orig;
188 public In(InputStream in) { orig = in; }
190 char[] cbuf = new char[8192];
194 byte[] buf = new byte[8192];
198 boolean flushing = false;
200 public int available() { return flushing ? 0 : (end - start); }
201 public void close() { try { if (orig!=null) orig.close(); } catch (Exception e) { Log.error(this, e); } }
203 public char getc(boolean peek) { try {
204 if (cstart == cend) {
206 cend = reader.read(cbuf, 0, cbuf.length);
209 if (in_next == null) throw new EOF();
211 orig = in_next.in.orig;
212 in_next = in_next.in_next;
216 return peek ? cbuf[cstart] : cbuf[cstart++];
217 } catch (IOException e) { return (char)ioe(e); } }
219 public String readln() { try {
221 for(int i=cstart; i<cend; i++)
222 if (cbuf[i] == '\n') {
223 // this should (in theory) handle CR, LF,
224 // CRLF, and LFCR properly, assuming that the
225 // file consistently uses the same ending
230 if (cbuf[begin] == '\r') { begin++; len--; }
231 while (len > 0 && cbuf[begin+len-1] == '\r') { len--; }
232 return new String(cbuf, begin, len);
235 int numread = reader.read(cbuf, cend, cbuf.length - cend);
237 if (cstart == cend) return null;
238 String ret = new String(cbuf, cstart, cend-cstart);
244 } catch (IOException e) { ioe(e); return null; } }
246 public int read(char[] c, int pos, int len) { try {
247 if (cstart == cend) {
249 cend = reader.read(cbuf, 0, cbuf.length);
250 if (cend == -1) { cend = cstart; return -1; }
252 if (len > cend - cstart) len = cend - cstart;
253 System.arraycopy(cbuf, cstart, c, pos, len);
256 } catch (IOException e) { ioe(e); return -1; } }
258 public int readBytes(byte[] b, int pos, int len) { flushchars(); return read(b, pos, len); }
259 public int read() { byte[] b = new byte[1]; if (read(b, 0, 1) == -1) return -1; return (int)b[0]; }
260 public int read(byte[] b, int pos, int len) { try {
263 end = orig.read(buf, 0, buf.length);
264 if (end == -1) { end = start; return -1; }
266 if (len > end - start) len = end - start;
267 System.arraycopy(buf, start, b, pos, len);
270 } catch (IOException e) { ioe(e); return -1; } }
272 private void growc(int s){char[] cbuf2=new char[cbuf.length+s*2];System.arraycopy(cbuf,0,cbuf2,0,cbuf.length);cbuf=cbuf2; }
273 private void shiftc() {
274 char[] cbuf2 = new char[cbuf.length];
275 System.arraycopy(cbuf, cstart, cbuf2, 0, cend-cstart);
280 private void ensurec(int space) { if (cend-cstart+space>cbuf.length) growc(space); if (cend+space>cbuf.length) shiftc(); }
282 private void growb(int s) { byte[] buf2 = new byte[buf.length+s*2]; System.arraycopy(buf,0,buf2,0,buf.length); buf=buf2; }
283 private void shiftb() { System.arraycopy(buf, start, buf, 0, end-start); end -= start; start = 0; }
284 private void ensureb(int space) { if (end-start+space>buf.length) growb(space); if (end+space>buf.length) shiftb(); }
285 private void ensureb2(int space) { if (end-start+space>buf.length) growb(space); if (start<space) unshiftb(); }
286 private void unshiftb() {
287 System.arraycopy(buf,start,buf,buf.length-(end-start),end-start);start=buf.length-(end-start);end=buf.length; }
289 public void unread(String s) { ensurec(s.length()); s.getChars(0, s.length(), cbuf, cend); cend += s.length(); }
291 private void flushchars() {
294 for(; reader.ready(); reader.read(cbuf, cend++, 1)) ensurec(1);
295 unreader.write(cbuf, cstart, cend);
298 } catch (IOException e) { ioe(e);
299 } finally { flushing = false; }
302 Writer unreader = new OutputStreamWriter(new InOutputStream());
303 private class InOutputStream extends OutputStream {
304 public void close() { }
305 public void write(int i) throws IOException { byte[] b = new byte[1]; b[0] = (byte)i; write(b, 0, 1); }
306 public void write(byte[] b) throws IOException { write(b, 0, b.length); }
307 public void write(byte[] b, int p, int l) {
309 System.arraycopy(b, p, buf, start-l, l);
315 public static interface Transformer {
316 public Stream transform(Stream in);